101*7.8-7.8简便运算
问题描述:
101*7.8-7.8简便运算
答
101x7.8-7.8
=(101-1)x7.8
=100x7.8
=780
101*7.8-7.8简便运算
101x7.8-7.8
=(101-1)x7.8
=100x7.8
=780